Singing Note Detector
Sing a note and instantly see the note name (e.g. A4, C#5), its frequency in Hz, and how many cents sharp or flat you are. Perfect for ear training and solfège practice.
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How to use
- Choose your voice type so the detector picks the correct octave.
- Click Start Detection and sustain any note.
- Read the large note name display and the cents gauge below it.
- Aim for the green zone (±5 cents) to be in perfect tune.
Not Sure What Note You're Singing?
This free singing note detector — also called a note finder or pitch reader — listens through your microphone and instantly tells you what note you are singing. Musical note names follow the letters A through G, repeated across multiple octaves. The number after the letter indicates the octave: C4 is middle C (261.63 Hz), A4 is concert A (440 Hz), and notes go higher as the octave number increases. Sharp (#) and flat (b) notes fall between the natural notes.
Our singing note detector identifies notes across the full vocal range, from the deep bass E2 (82 Hz) all the way to soprano G5 (784 Hz). Each note is displayed with its full scientific pitch notation (e.g. A4, C#5, Bb3) so you always know exactly which pitch you are singing and what its frequency is.
The cents deviation gauge shows how close you are to the exact pitch center. One semitone equals 100 cents, so a reading of +15 cents means you are 15% of a semitone sharp. Professional singing is typically within 10 cents; most listeners perceive errors above 25 cents as "out of tune."
Note Frequency Reference Chart (Hz)
Use this chart to cross-reference the note name shown by the detector with its exact frequency in Hz. Each column is one octave; each row is one of the 12 chromatic notes. The highlighted row is A4 = 440 Hz, the universal tuning reference.
| Note | Oct 2 | Oct 3 | Oct 4 | Oct 5 | Oct 6 |
|---|---|---|---|---|---|
| C | 65.41 | 130.81 | 261.63 | 523.25 | 1046.50 |
| C#/Db | 69.30 | 138.59 | 277.18 | 554.37 | 1108.73 |
| D | 73.42 | 146.83 | 293.66 | 587.33 | 1174.66 |
| D#/Eb | 77.78 | 155.56 | 311.13 | 622.25 | 1244.51 |
| E | 82.41 | 164.81 | 329.63 | 659.25 | 1318.51 |
| F | 87.31 | 174.61 | 349.23 | 698.46 | 1396.91 |
| F#/Gb | 92.50 | 185.00 | 369.99 | 739.99 | 1479.98 |
| G | 98.00 | 196.00 | 392.00 | 783.99 | 1567.98 |
| G#/Ab | 103.83 | 207.65 | 415.30 | 830.61 | 1661.22 |
| A | 110.00 | 220.00 | 440.00 | 880.00 | 1760.00 |
| A#/Bb | 116.54 | 233.08 | 466.16 | 932.33 | 1864.66 |
| B | 123.47 | 246.94 | 493.88 | 987.77 | 1975.53 |
A4 = 440 Hz (concert pitch standard)
Using the Note Detector for Ear Training
Ear training is the practice of recognizing musical elements by sound alone. A singing note detector accelerates ear training by providing instant visual confirmation of what you hear. When you think you are singing a G but the detector shows F#, you get immediate corrective feedback that reinforces the correct pitch memory.
Effective ear training exercises with this tool: sing each note of a scale and verify each one lands on the correct degree; practice intervals (sing the root, then a fifth above, and confirm the detector reads the correct note); work on solfege syllables (Do, Re, Mi) while the detector confirms your accuracy.
Who Benefits from a Singing Note Detector?
Beginning singers
When you are learning to sing, it can be hard to tell whether you are on the right note. A real-time note name display gives you objective confirmation so you can develop accurate pitch awareness faster.Music students doing solfège
Verify each syllable as you sing exercises. The cents gauge shows you not just which note but how accurately you are placing it.Actors and speakers
Spoken pitch is just as important as sung pitch for performance and communication. Use the note detector to map your speaking range and identify your natural speaking fundamental frequency.Instrument players learning to sing in tune
Instrumentalists who also sing can use the note detector to bridge the gap between the pitch names they know from their instrument and the pitch they actually produce with their voice.
Frequently Asked Questions
Use this free singing note detector: allow microphone access, sing a note, and the tool instantly displays the note name (e.g. A4, C#5), its frequency in Hz, and how many cents sharp or flat you are. No piano or music theory knowledge required.
A note finder identifies which musical note (e.g. G4) you are singing or playing. A pitch detector does the same and also shows the exact frequency in Hz and cents deviation. This tool is both — a note finder, pitch detector, and pitch reader in one.
One cent is 1/100th of a semitone. There are 100 cents between any two adjacent notes (e.g. A4 to A#4). A reading of +15 cents means you are singing 15% of a semitone sharp. Professional singers stay within ±10 cents; most listeners perceive errors above ±25 cents as out of tune.
Yes. A pitch reader, note finder, and singing note detector all refer to the same type of tool — software that listens through your microphone and identifies the pitch you are producing. This tool displays note name, Hz, and cents deviation in real time.
Yes. Sing each syllable (Do, Re, Mi, Fa, Sol, La, Ti) and verify the note name shown matches the correct scale degree. The cents gauge gives immediate intonation feedback, making this an effective ear training tool for singers at any level.
Singing Carrots is a vocal training platform with courses and exercises. This singing note detector is a single-purpose real-time tool — open the page, sing, see the note instantly. No account, no curriculum. All audio processing runs locally in your browser with no data uploaded to any server.
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